JP3968469B2 - Recording / reproducing apparatus and data recording method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a recording / reproducing apparatus and a data recording method.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, electronic devices such as printers and modems that are connected to a control device such as a personal computer (personal computer) are known. Such an electronic device has an interface such as RS232C or Centronics, for example, is connected to a control device via a predetermined cable, and operates according to control from the control device.
In recent years, USB (Universal Serial Bus) or the like has attracted attention as an interface standard adopted for personal computers and the like (control devices). This USB is supported by a general OS (Operating System) installed in a personal computer. To use a hot plug-in or electronic device that can be connected to an electronic device with the personal computer turned on. It features plug-and-play that can automatically set up.
[0003]
Recently, a new interface standard called “NetMD (registered trademark)” for connecting a personal computer and an MD (mini disk) recording / reproducing device using the USB has been developed.
The NetMD standard is an extension standard for music MD, and based on a strong copyright protection technology, music data recorded on a hard disk of a personal computer is transferred to an MD recording / reproducing device and recorded on a commercially available recording MD. Is. At that time, since the music data in a state before decoding is transferred as it is, deterioration in sound quality due to decoding / encoding or the like is prevented. Further, unlike the recording associated with the reproduction, since the data transfer is substantial, the recording is completed several times to several tens of times faster than the normal recording.
[0004]
Each audio maker manufactures various MD recording / reproducing devices corresponding to the NetMD standard having such characteristics and has started to put them on the market. Such MD recording / reproducing devices are gradually spreading among users who own personal computers.
[0005]
[Problems to be solved by the invention]
As described above, an MD recording / playback device compatible with the NetMD standard is connected to a personal computer and receives transfer of music data (content). Specifically, the MD recording / reproducing device sequentially receives the content data transferred in units of one sector (2332 bytes) in accordance with the NetMD standard, and records it in the MD.
When the transfer in units of one sector progresses sequentially and reaches the end of the content (transfer end), content data including unused data in the sector may be transferred. That is, the content capacity is not necessarily divisible by the sector unit, and when it is not divisible, the last content data includes unused data for filling the gap.
[0006]
The conventional MD recording / reproducing device records the content data received in units of sectors as it is in the MD. In other words, although content management can be performed in units of sound groups (424 bytes) using UTOC (User Table Of Contents), unused data is added to the content in order to perform content management in units of sectors. It will be recorded on MD as a thing. This unused data becomes a silent part.
For this reason, the MD recording / playback device has a problem that when the content (music data) to which unused data is added is played back, the end of the song is played back silently. The silent reproduction time may be up to about 240 milliseconds when the content recording mode (track mode) is “long-time recording mode (ATRAC3 LP4)”.
[0007]
In addition, such unused data wastes the capacity of the MD, and there is a problem that the remaining recordable amount of new content is reduced accordingly.
[0008]
The present invention has been made in view of the above circumstances, and an object thereof is to provide a recording / reproducing apparatus and a data recording method capable of appropriately recording content in accordance with the data capacity.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a recording / reproducing apparatus according to the first aspect of the present invention provides:
A recording / reproducing apparatus for recording content transferred for each fixed unit amount from an external control device via a predetermined interface on a predetermined recording medium,
An acquisition means for acquiring a content size indicating a capacity managed on the control device side for the transferred content;
Receiving means for sequentially receiving content transferred from the control device for each fixed unit amount;
Recording means for sequentially recording the content received by the receiving means on a recording medium;
According to the relationship between the content size acquired by the acquiring unit and the unit amount at the time of transfer, the effective data amount in the fixed unit amount last received by the receiving unit is a recording unit that can be managed on the recording / reproducing apparatus side. Detecting means for detecting;
Updating means for updating management information for managing the recording position of the content in the recording medium using the effective data amount detected by the detecting means;
It is characterized by providing.
[0011]
In order to achieve the above object, a recording / reproducing apparatus according to the second aspect of the present invention provides:
A recording / reproducing apparatus for recording content transferred for each fixed unit amount from an external control device via a predetermined interface on a predetermined recording medium,
An acquisition means for acquiring a content size indicating a capacity managed on the control device side for the transferred content;
Receiving means for sequentially receiving content transferred from the control device for each fixed unit amount;
Recording means for sequentially recording the content received by the receiving means on a recording medium;
According to the relationship between the content size acquired by the acquisition unit and the unit amount at the time of transfer, the unused capacity in the fixed unit amount last received by the reception unit is a recording unit that can be managed on the recording / reproducing apparatus side. Detecting means for detecting;
The unused unit detected by the detection unit is excluded from the fixed unit amount received by the reception unit last time, and the recording position of the content in the recording medium is managed using the data amount after the exclusion. Updating means for updating management information to be
It is characterized by providing.
[0012]
The detection means detects the effective data amount or unused capacity in the fixed unit amount received last, in a recording unit that can be managed on the recording / reproducing apparatus side based on the recording mode of the content,
The update unit may update the management information using the effective data amount or the unused capacity detected based on the recording mode.
In order to achieve the above object, a recording / reproducing apparatus according to the third aspect of the present invention provides:
A recording / reproducing apparatus that manages music data with a sound group larger than the sound frame as a minimum unit, connected to an external control device that manages the music data with a sound frame as a minimum unit, via a predetermined interface,
Acquisition means for acquiring recording mode and capacity information in units of sound frames for music data to be transferred;
Receiving means for sequentially receiving music data transferred from the control device in units of sectors larger than the sound group;
Recording means for recording the music data received by the receiving means in units of sectors on a predetermined recording medium;
Update means for updating management information for managing music data recorded on the recording medium from a sector unit to a sound group unit according to the recording mode and capacity information acquired by the acquisition unit;
It is characterized by providing.
[0013]
In order to achieve the above object, a data recording method according to the fourth aspect of the present invention includes:
A data recording method in a recording / reproducing apparatus for recording data, which is transferred for each fixed unit amount from an external control device via a predetermined interface, on a predetermined recording medium,
An acquisition step of acquiring a data size indicating a capacity managed on the control device side for the transferred data;
A reception step of sequentially receiving data transferred from the control device for each fixed unit amount;
A recording step of sequentially recording the data received in the receiving step on a recording medium;
According to the relationship between the data size acquired in the acquisition step and the unit amount at the time of transfer, the effective data amount in the fixed unit amount last received in the reception step can be managed on the recording / reproducing apparatus side A detection step for detecting in a recording unit,
Using the effective data detected in the detecting step, updating the management information for managing the recording position of the data in the recording medium; and
It is characterized by providing.
[0014]
In order to achieve the above object, a data recording method according to the fifth aspect of the present invention includes:
A data recording method in a recording / reproducing apparatus for recording data, which is transferred for each fixed unit amount from an external control device via a predetermined interface, on a predetermined recording medium,
An acquisition step of acquiring a data size indicating a capacity managed on the control device side for the transferred data;
A reception step of sequentially receiving data transferred from the control device for each fixed unit amount;
A recording step of sequentially recording the data received in the receiving step on a recording medium;
According to the relationship between the data size acquired in the acquisition step and the unit amount at the time of transfer, the unused capacity in the fixed unit amount last received in the reception step can be managed on the recording / reproducing apparatus side A detection step for detecting in a recording unit,
The amount of unused capacity detected in the detection step is excluded from the fixed unit amount last received in the reception step, and the amount of data in the recording medium is used using the data amount after the exclusion . An update step for updating the management information for managing the recording position;
It is characterized by providing.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
A recording / reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings.
[0016]
FIG. 1 is a block diagram showing an example of the configuration of a system including a recording / reproducing apparatus 1 applied to the embodiment of the present invention. As shown in the figure, this system is configured by connecting a recording / reproducing apparatus 1 and a personal computer 3 via a USB cable C.
[0017]
The recording / reproducing apparatus 1 is an audio device compliant with the “NetMD (registered trademark)” standard, and as shown in the figure, a security circuit 11, a digital signal processing circuit 12, a head driver 13, a recording head 14, a spindle The motor 15, the optical pickup 16, the feed motor 17, the RF amplifier 18, the buffer memory 19, the system controller 20, the operation unit 21, and the display panel 22 are included.
[0018]
That is, the recording / reproducing apparatus 1 records music data (contents) transferred from the personal computer 3 in units of one sector at the time of checkout on a disk d (MD; mini disk) in accordance with the NetMD standard. At the time of check-in, the music data recorded on the disk d is returned to the personal computer 3 (actually, a content hash is returned and the music data is deleted from the disk d).
[0019]
Incidentally, the disk d is provided with a UTOC (User Table Of Contents) area and a program area.
Specifically, the UTOC area has a structure as shown in FIG. 2 and stores UTOC information. The UTOC information is information for managing music data recorded on the disk d, and the start address, end address, track mode, and the like are set for each music data. Set.
[0020]
Note that the start address and end address are information defining the recording position of the music data on the disk d, and the cluster (CL), sector (SC), and sound group for indicating the position address on the disk d. The value of (SG) is set.
The track mode is information defining whether or not music data can be copied and the type of recording mode. For example, the track mode includes recording modes such as “ATRAC Stereo”, “ATRAC3 LP2”, “ATRAC3 LP4”, and the like.
[0021]
On the other hand, the program area has a structure as shown in FIG. 3, and music data is written therein. The program area of FIG. 3 shows two sectors and is composed of 11 sound groups (sound group 0 to sound group A in the figure) (that is, one sector is composed of 5.5 sound groups). )
[0022]
FIG. 4 shows the structure of the sound group. As shown in FIG. 4, one sound group is composed of two sound frames (SF). Therefore, one sector is composed of 11 sound frames.
[0023]
Returning to FIG. 1, the security circuit 11 includes a USB interface for communicating with the personal computer 3 via the USB cable C, authenticates with the personal computer 3, and is necessary for check-out / check-in. Is read out from the MD (disk d) via the system controller 20.
[0024]
The digital signal processing circuit 12 operates as an ADIP (ADdress In Pre-groove) decoder, an EFM (Eight to Fourteen Modulation) decoder, a shock proof memory controller, an ATRAC (Adaptive TRansform Acoustic Coding) encoder / decoder, and a servo controller. To do.
Specifically, the digital signal processing circuit 12 is controlled by the system controller 20 and the like, and controls the spindle motor 15, the optical pickup 16, the feed motor 17, the head driver 13, and the like.
For example, when the music data is checked out, the digital signal processing circuit 12 acquires the music data transferred from the personal computer 3 via the security circuit (USB interface) 11 and stores it in the buffer memory 19 while the head driver 13 etc. To record music data on the disk d.
[0025]
The head driver 13 controls the recording head 14 to record music data in the program area shown in FIG. Further, the head driver 13 updates the UTOC information in the UTOC area shown in FIG. 2 in order to manage the music data recorded in the program area.
[0026]
The spindle motor 15 rotates a turntable (not shown) on which the disk d is mounted.
The optical pickup 16 irradiates a recording surface of the disk d with laser light having a predetermined wavelength when reproducing music data, receives the reflected light, and converts it into an electrical signal. Then, the converted electric signal is supplied to the RF amplifier 18.
The optical pickup 16 irradiates the recording surface of the disk d with laser light when recording music data, and heats it until it reaches the Curie point or higher.
[0027]
The feed motor 17 is controlled by the digital signal processing circuit 12 and moves the optical pickup 16 to a predetermined position on the disk d.
The RF amplifier 18 generates an RF signal, a focus error signal, a tracking error signal, and the like from the electrical signal supplied from the optical pickup 16. The RF amplifier 18 supplies the generated RF signal or the like to the digital signal processing circuit 12 or the like.
[0028]
The buffer memory 19 temporarily stores a predetermined amount of music data at the time of checkout or playback.
[0029]
The system controller 20 includes, for example, a one-chip microcomputer including an internal memory, and controls the security circuit 11 and the digital signal processing circuit 12 to control the entire recording / reproducing apparatus 1.
The system controller 20 includes a content capacity management unit 20a. The content capacity management unit 20a acquires the content size in units of sound frames sent from the personal computer 3 at the time of checkout, and a fraction less than a sector unit from this content size (final in units of a sound group). Ask for. This fraction is a substantially effective data amount in the music data (end of transfer) transferred at the end of the sector unit.
The system controller 20 then updates the UTOC information in accordance with the fraction obtained by the content capacity management unit 20a when there is a download end instruction from the personal computer 3.
[0030]
The operation unit 21 includes, for example, a plurality of key switch groups, and supplies instruction information to the system controller 20 in accordance with a user operation (such as pressing).
[0031]
The display panel 22 is composed of a liquid crystal display panel or the like, and displays characters, figures, and the like indicating the operation status of the recording / reproducing apparatus 1 in accordance with display data supplied from the system controller 20.
[0032]
On the other hand, the personal computer 3 is composed of a general-purpose personal computer equipped with an arithmetic unit such as a CPU, a storage element such as a memory and a hard disk, an operation device such as a mouse and a keyboard, a display device such as a display, and a USB interface. The personal computer 3 is detachably connected to the recording / reproducing apparatus 1 via the USB cable C.
The personal computer 3 operates in accordance with an OS (Operating System) installed on a hard disk or the like, and executes application software corresponding to the NetMD standard on the OS.
[0033]
Specifically, the personal computer 3 uses the checkout function to transfer music data (contents) stored in advance on the hard disk to the recording / reproducing apparatus 1 and record it on the disk d.
At that time, the personal computer 3 transfers music data in units of one sector. When the transfer in units of sectors progresses and the end of the music data (end of transfer) is reached, music data including unused data in the sector may be transferred. That is, when the capacity of music data cannot be divided in units of sectors, the personal computer 3 transfers unused data for filling the gap in the last music data.
[0034]
The operation of the recording / reproducing apparatus 1 according to the embodiment of the present invention will be described below with reference to FIGS.
FIG. 5 is a schematic diagram showing an example of a signal waveform at the time of data transfer between the security circuit 11 and the digital signal processing circuit 12. FIG. 6 is a flowchart for explaining the fraction calculation processing executed by the content capacity management unit 20a. FIG. 7 is a flowchart for explaining a recording process executed by the system controller 20.
[0035]
First, the manner in which music data transferred from the personal computer 3 to the recording / reproducing apparatus 1 is supplied to the digital signal processing circuit 12 will be described with reference to FIG.
When music data is transferred from the personal computer 3, it is supplied to the digital signal processing circuit 12 via the security circuit 11. Specifically, as shown in FIG. 5A, a request signal (REQ in the figure) is supplied from the digital signal processing circuit 12 to the security circuit 11, and in response to this, music data (DATA in the figure) is received. The digital signal processing circuit 12 is supplied from the security circuit 11. FIG. 5B is an enlarged view of one byte in FIG.
[0036]
When music data for one sector is supplied to the digital signal processing circuit 12, the digital signal processing circuit 12 temporarily stores it in the buffer memory 19. At that time, the digital signal processing circuit 12 generates a sector sync (sector interrupt) and supplies it to the system controller 20.
Thus, the music data is transferred to the digital signal processing circuit 12 in units of one sector.
[0037]
Next, with reference to FIG. 6, the fraction calculation process executed by the content capacity management unit 20a will be described. This fraction calculation process is started when detailed information of music data sent from the personal computer 3 is sent to the recording / reproducing apparatus 1 at the time of checkout (prior to the transfer of music data). Note that the detailed information includes the content size in units of sound frames (SF) in addition to the track attribute, the track mode, and the like.
[0038]
First, the content capacity management unit 20a receives the track mode (Tm) and content size (Cs) of content (music data) via the security circuit 11 (step S11).
[0039]
The content capacity management unit 20a calculates a fraction SF_Fr less than one sector from the content size (step S12). Specifically, the content capacity management unit 20a calculates a remainder obtained by dividing the content size (Cs) by 11 (the number of sound frames per sector).
[0040]
The content capacity management unit 20a determines whether or not the track mode (Tm) is “ATRAC3 LP4” (step S13). That is, it is determined whether or not the minimum unit of content is “ATRAC3 LP4” which is a sound frame (SF).
[0041]
If the content capacity management unit 20a determines that the track mode (Tm) is not “ATRAC3 LP4”, the content capacity management unit 20a advances the process to step S16 described later. On the other hand, if it is determined that it is “ATRAC3 LP4”, it is determined whether or not the fraction SF_Fr is an odd number (step S14).
[0042]
When the fraction SF_Fr is not an odd number (even), the content capacity management unit 20a advances the process to step S16 described later. Conversely, when the fraction SF_Fr is an odd number, the content capacity management unit 20a sets the fraction SF_Fr to the fraction SF_Fr. 1 is added to make an even number (step S15).
[0043]
The content capacity management unit 20a calculates a fraction SG_Fr corresponding to the sound group (SG) which is the minimum unit in UTOC management (step S16).
That is, the fraction SG_Fr is calculated by dividing the fraction SF_Fr by 2.
The content capacity management unit 20a stores the calculated fraction SG_Fr in the internal memory so that the system controller 20 can use it.
[0044]
Next, a recording process executed by the system controller 20 will be described with reference to FIG. This recording process is started after the fraction SG_Fr of the sound group (SG) unit is calculated by the fraction calculation process described above.
[0045]
First, the system controller 20 acquires the start address (CL: SC: SG) of the recordable area from the UTOC information shown in FIG. 2 (step S21). That is, position information for starting recording of new music data is acquired in the program area of the disk d.
The system controller 20 stores the acquired start address in its own memory, and also sets the same value for the work end address and stores it in its own memory.
[0046]
The system controller 20 stands by until a sector sync is detected (step S22). That is, as shown in FIG. 5A, the system controller 20 continues the subsequent processing until the music data for one sector sent from the personal computer 3 via the security circuit 11 is supplied to the digital signal processing circuit 12. Wait.
[0047]
When the sector sync is detected, the system controller 20 determines whether or not the number of unrecorded sectors exceeds 32 (step S23). That is, it is determined whether or not unrecorded music data stored in the buffer memory 19 has accumulated for 32 sectors.
[0048]
Only when it is determined that the number of unrecorded sectors exceeds 32, the system controller 20 writes music data for 32 sectors (one cluster) in the program area of the disk d (step S24). At this time, the system controller 20 adds 1 to CL of the end address (CL: SC: SG) stored in its own memory.
[0049]
The system controller 20 determines whether a download end instruction has been received from the personal computer 3 (step S25). That is, it is determined whether or not an end instruction indicating that the transfer of music data has ended is received.
[0050]
If the system controller 20 determines that the download end instruction has not been received, the system controller 20 returns the process to step S22, and repeatedly executes the processes of steps S22 to S25 described above.
On the other hand, when it is determined that the download end instruction has been received, the system controller 20 writes music data for 32 sectors including the remaining unrecorded sectors on the disc (step S26). At this time, the system controller 20 adds the value of the remaining unrecorded sector to the SC of the end address (CL: SC: SG) stored in its own memory.
[0051]
The system controller 20 determines whether or not the SC of the end address (CL: SC: SG) stored in its own memory is an even number (step S27). When determining that SC is an even number, the system controller 20 determines whether or not the value of the fraction SG_Fr obtained in the fraction calculation process described above is larger than 0 (step S28). That is, it is determined whether or not a fractional value is set in the fractional SG_Fr.
[0052]
When it is determined that the fractional value is set, the system controller 20 sets the value of the fraction SG_Fr to the SG of the end address (CL: SC: SG), and calculates the final end address (step S29). .
On the other hand, when it is determined that the fractional value is not set, the system controller 20 sets 4 to the SG of the end address (CL: SC: SG), and calculates the final end address (step S30). .
[0053]
If it is determined in step S27 that the SC of the end address (CL: SC: SG) is not even (odd), the system controller 20 determines whether or not a fractional value is set in the fraction SG_Fr. Is determined.
[0054]
When it is determined that the fractional value is set, the system controller 20 sets the value of the fraction SG_Fr + 5 in the SG of the end address (CL: SC: SG), and calculates the final end address (step S32). .
On the other hand, when it is determined that the fractional value is not set, the system controller 20 sets Ah (hexadecimal number) to SG of the end address (CL: SC: SG), and calculates the final end address. (Step S33).
[0055]
Then, the system controller 20 updates the UTOC information using the finally calculated end address or the like (step S34).
[0056]
As described above, the recording process described above reflects the content size indicating the substantially effective capacity of the music data (content), and the UTOC information is updated.
For this reason, since the data amount of music data transferred from the personal computer 3 and the content size on the UTOC exactly match, unused data is not added and unnecessary silent reproduction is not performed.
At the same time, since the remaining capacity of the disk d is not consumed unnecessarily, the recordable remaining capacity of the disk d does not decrease unnecessarily.
[0057]
As a result, content (music data) can be recorded appropriately according to the data capacity.
[0058]
In the above embodiment, the fraction calculated by the fraction calculation process is used as the effective data amount. However, the unused capacity in the music data is obtained from the fraction calculated by the fraction calculation process to update the UTOC information. May be used.
For example, conventionally, music data received in units of sectors may be recorded on the disk d as it is, and after writing the UTOC information, the UTOC information may be updated according to the obtained unused capacity. That is, the end address of the UTOC information is updated by subtracting the obtained unused capacity.
Also in this case, since the data amount of music data transferred from the personal computer 3 and the content size on the UTOC exactly match, unused data is not added and unnecessary silent reproduction is not performed.
At the same time, since the remaining capacity of the disk d is not consumed unnecessarily, the recordable remaining capacity of the disk d does not decrease unnecessarily.
[0059]
In the above embodiment, music data or the like is recorded on the disc d made of MD in order to explain the recording / playback apparatus compliant with the NetMD standard. However, the target recording medium for recording music data or the like is not limited to MD. It is optional.
For example, music data or the like may be recorded on a recording medium such as MO (Magneto-Optical disk) or DVD-RAM (Digital Versatile Disk-RAM). Music data or the like may be recorded on a recording medium such as a trademark.
Furthermore, the data to be recorded on the recording medium is not limited to music data, but may be video data or the like.
[0060]
In the above-described embodiment, the recording / reproducing apparatus 1 and the personal computer 3 each have a USB interface, and the audio system in which the recording / reproducing apparatus 1 and the personal computer 3 are connected via the USB cable C has been described. . However, the interfaces provided in the recording / reproducing apparatus 1 and the personal computer 3 are not limited to USB and are arbitrary. For example, an interface such as IEEE 1394 may be used, and the recording / reproducing apparatus 1 and the personal computer 3 may be connected via an IEEE 1394 cable.
[0061]
【The invention's effect】
As described above, according to the present invention, content can be recorded appropriately according to the data capacity.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an example of the configuration of a system including a recording / reproducing apparatus according to an embodiment of the present invention.
FIG. 2 is a schematic diagram for explaining the structure of a UTOC area in a disc.
FIG. 3 is a schematic diagram for explaining the structure of a program area in a disc.
FIG. 4 is a schematic diagram for explaining the structure of a sound group.
FIGS. 5A and 5B are schematic diagrams showing examples of signal waveforms at the time of data transfer between the security circuit and the digital signal processing circuit, where FIG. 5A shows one sector; (B) is an enlarged view of one byte therein.
FIG. 6 is a flowchart for explaining fraction calculation processing according to the embodiment of the present invention;
FIG. 7 is a flowchart for explaining a recording process according to the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Recording / reproducing apparatus 11 Security circuit 12 Digital signal processing circuit 13 Head driver 14 Recording head 15 Spindle motor 16 Optical pick-up 17 Feed motor 18 RF amplifier 19 Buffer memory 20 System controller 20a Content capacity management part 21 Operation part 22 Display panel C USB cable

Claims (6)

A recording / reproducing apparatus for recording content transferred for each fixed unit amount from an external control device via a predetermined interface on a predetermined recording medium,
An acquisition means for acquiring a content size indicating a capacity managed on the control device side for the transferred content;
Receiving means for sequentially receiving content transferred from the control device for each fixed unit amount;
Recording means for sequentially recording the content received by the receiving means on a recording medium;
According to the relationship between the content size acquired by the acquisition unit and the unit amount at the time of transfer, the effective data amount in the fixed unit amount last received by the reception unit is a recording unit that can be managed by the recording / reproducing apparatus. Detecting means for detecting;
Updating means for updating management information for managing the recording position of the content in the recording medium using the effective data amount detected by the detecting means;
A recording / reproducing apparatus comprising: A recording / reproducing apparatus for recording content transferred for each fixed unit amount from an external control device via a predetermined interface on a predetermined recording medium,
An acquisition means for acquiring a content size indicating a capacity managed on the control device side for the transferred content;
Receiving means for sequentially receiving content transferred from the control device for each fixed unit amount;
Recording means for sequentially recording the content received by the receiving means on a recording medium;
According to the relationship between the content size acquired by the acquisition unit and the unit amount at the time of transfer, the unused capacity in the fixed unit amount last received by the reception unit is a recording unit that can be managed on the recording / reproducing apparatus side. Detecting means for detecting;
The unused unit detected by the detection unit is excluded from the fixed unit amount received by the reception unit last time, and the recording position of the content in the recording medium is managed using the data amount after the exclusion. Updating means for updating management information to be
A recording / reproducing apparatus comprising: The detection means detects the effective data amount or unused capacity in the fixed unit amount received last, in a recording unit that can be managed on the recording / reproducing apparatus side based on the recording mode of the content,
The update means updates the management information using the effective data amount or unused capacity detected based on the recording mode,
The recording / reproducing apparatus according to claim 1, wherein A recording / reproducing apparatus that manages music data with a sound group larger than the sound frame as a minimum unit, connected to an external control device that manages the music data with a sound frame as a minimum unit, via a predetermined interface,
Acquisition means for acquiring recording mode and capacity information in units of sound frames for music data to be transferred;
Receiving means for sequentially receiving music data transferred from the control device in units of sectors larger than the sound group;
Recording means for recording the music data received by the receiving means in units of sectors on a predetermined recording medium;
Update means for updating management information for managing music data recorded on the recording medium from a sector unit to a sound group unit according to the recording mode and capacity information acquired by the acquisition unit;
A recording / reproducing apparatus comprising: A data recording method in a recording / reproducing apparatus for recording data, which is transferred for each fixed unit amount from an external control device via a predetermined interface, on a predetermined recording medium,
An acquisition step of acquiring a data size indicating a capacity managed on the control device side for the transferred data;
A reception step of sequentially receiving data transferred from the control device for each fixed unit amount;
A recording step of sequentially recording the data received in the receiving step on a recording medium;
According to the relationship between the data size acquired in the acquisition step and the unit amount at the time of transfer, the effective data amount in the fixed unit amount last received in the reception step can be managed on the recording / reproducing apparatus side A detection step for detecting in a recording unit,
Using the effective data detected in the detecting step, updating the management information for managing the recording position of the data in the recording medium; and
A data recording method comprising: A data recording method in a recording / reproducing apparatus for recording data, which is transferred for each fixed unit amount from an external control device via a predetermined interface, on a predetermined recording medium,
An acquisition step of acquiring a data size indicating a capacity managed on the control device side for the transferred data;
A reception step of sequentially receiving data transferred from the control device for each fixed unit amount;
A recording step of sequentially recording the data received in the receiving step on a recording medium;
According to the relationship between the data size acquired in the acquisition step and the unit amount at the time of transfer, the unused capacity in the fixed unit amount last received in the reception step can be managed on the recording / reproducing apparatus side A detection step for detecting in a recording unit,
The amount of unused capacity detected in the detection step is excluded from the fixed unit amount last received in the reception step, and the amount of data in the recording medium is used using the data amount after the exclusion . An update step for updating the management information for managing the recording position;
A data recording method comprising:

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